Observation of optical anisotropy and a linear dichroism transition in layered silicon phosphide
Xing Xie, Junnan Ding, Biao Wu, Haihong Zheng, Shaofei Li, Chang‐Tian Wang, Jun He, Zongwen Liu, Jian-Tao Wang, Ji’an Duan, Yanping Liu
Abstract
Raman modes in 2D SiP materials allows for the determination of their crystal orientation. Furthermore, the presence of indirect excitons with phonon sidebands in the temperature-dependent PL spectra exhibits non-monotonic energy shifts with increasing temperature, which is attributed to an enhanced electron-phonon interaction and thermal expansion. Our findings provide valuable insights into the fundamental physical properties of layered SiP and offer guidelines for designing polarization-sensitive photodetectors and angle-dependent devices based on 2D anisotropic materials.
Topics & Concepts
Materials scienceAnisotropyLinear dichroismPhononPhotoluminescencePhotodetectorIsotropyOptoelectronicsPolarization (electrochemistry)ExcitonAbsorption (acoustics)OpticsCondensed matter physicsMolecular physicsCircular dichroismCrystallographyChemistryPhysicsPhysical chemistryComposite material2D Materials and ApplicationsGraphene research and applicationsNanowire Synthesis and Applications